Not the point I was making. Futaba, JR, Spek, Tactic...whatever. If you set your travel adjust and then use a reversing switch...The potential for overclocking the servo would exist. Not saying it's your fault the servo failed, I just want to understand what is causing the servos to fail; especially on the elevator. To me, what I mentioned above seems to be one of the most logical possibilities so far.

Sorry i am not the smartest guy when it comes to this things. PLease explain why you would ever set your control surface throws/travel before reversing the servos and then reverse them to throw the control surface the right way / set full deflection. I am confused. What did i miss?

No parpar, you aren't missing anything. It would either be an accident or a mistake made without much thought that wouldn't matter as much on other planes. The way the instructions read though; they don't say anything about reversing prior to travel adjust. They almost sound like the first thing you should do is perform the travel adjust.

Now sadly I report the death of a CZ Yak, and add to the servo saga...I stripped the gears on the stock servo on the left wing when I had the prop fly off 5 feet up. So I had two spare/replacement Eflite 7140's on hand. No big deal. Replaced the servo, actuated it and it worked fine. Actuated it some more prior to flight; and what's this? Locked in full deflection (it was on the aileron). Replaced it with the other spare Eflite 7140. Checked it and checked it again. Worked fine. Went to the field, performed pre flight checks 3 times and all was well. Took off, 30 sec in to the flight in went in to an uncontrollable corkscrew. Yep, you guessed it...The replaced servo locked in full deflection. Needless to say she ended up hitting terra firma hard. I had no problems with the stock servos that came on the planes, but after further research it is obvious that there is an intermittent short in BOTH spares I had in the flight box. Post flight inspection shows that all three stock servos perform normally, but the replacement 7140 would intermittently lock in full deflection.

I'm very confident in and satisfied with Eflite customer service; but please keep an eye on those replacement servos and maybe we can prevent more of this same issue.

Thanks parpar. Hope it save some people trouble, and aids in holding HH responsible for this. Was lucky I had two spare servos on hand. Damage can always be blamed on a crash during failure analysis (even when there's a known issue)...But with a brand new one doing the same thing it should provide some solid evidence.

Sorry to say Gentleman, the ONLY correction to this servo problem
is to replace them with HS82MG servos all four....Walt

Or a digital servo...HS5065's or HS5055's are a close fit...not sure which would be better or most suitable; but I do know one is actually a "close" to the same dimensions.

Now that brings up the question of how in the heck Eflite/HH is going to manage to correct this. If they had used a standard sized servo, they could have just started putting different servos in or replacing servos.

Not sure how I want to handle this even if they do replace the plane...Feel like they should also supply me with four servos of my choice because I don't think I can ever trust these servos again. $400 is a little steep for this plane BNF; but $525-$600 (once you replace the servos) is just stupid. I could almost build a 51" 3dhs slick for that price AND buy a spare fuse and wing set.

I replaced mine with mtal gear digitals from Imolab at a good prices from HK. I did need to use a sharp exacto to widen the holes a little. but a decent moddeling file would work just as well. Remember to attach a long servo extension to the RX end of the servo before pulling it out to make it easy to pull the new servo cable through for reconnection.

You can add another carbon z that had a servo failure to the list.
The servo went had left in flight and stayed there.
It was a rudder servo and was able to land the aircraft without any
damage.
Waiting replacement from HH.

Very soft retail market.... even softer hobby/discretional spend market and a drive to keep margins by getting cheaper suppliers. The result is quality control trade-off. That's my reading anyway.

That logic may sound reasonable in the "right now", but with 10 years working in QC and one semester away from having my degree in QC...You can either pay for quality now, or you can pay much more later. It's the whole instant gratification thing, I don't understand why companies keep doing it and driving themselves in to the ground.